2. ColourPreservative

3.  Antioxidants  Flavourings and preservatives

4.  Emulsifiers and thickeners  Acidity regulators

6.  Food must be safe Scientists have many chemical instruments to identify unknown chemicals.  Chromatography is one technique

8.  Set up a chromatogram.  Which inks contain more than one dye

9.  Why are substances added to food?  What is an E number?  Name and describe a technique used to detect food additives

10.  What happens when you make a paper chromatogram of coloured inks